Teledyne T360, Operation Manual, Page: 55 / 358

Teledyne API Model T360/T360M Operation Manual Getting Started
53
3.6.4. Pneumatic Connections in Multipoint Calibration Applications
Some applications may require multipoint calibration checks where span gas of
several different concentrations is needed. We recommend using high-
concentration, certified, calibration gas supplied to the analyzer through a Gas
Dilution Calibrator such as a Teledyne Instruments Model T700. This type of
calibrator precisely mixes Span Gas and Zero Air to produce any concentration
level between 0 ppm and the concentration of the calibrated gas.
Figure 3-20 depicts the pneumatic set up in this sort of application of a Model
T360 CO
2
Analyzer with ambient zero/ambient span valve option installed (a
common configuration for this type of application).
Figure 3-20: Example of Pneumatic Set up for Multipoint Calibration
3.6.5. Setting the Internal Purge Air Pressure
In order to maintain proper purge air flow though the GFC wheel housing, a
manually adjustable pressure regulator is provided (see Figure 3-5). This
regulator includes two output ports. One is used to supply purge air to the GFC
wheel. The other may be used to attach a pressure gauge.
To adjust the internal purge air pressure of the T360:
1. Turn off the instrument.
2. Remove the source of zero air attached to the purge line inlet port at the
back of the analyzer.
3. Remove the analyzer’s top cover.
07272B DCN6552